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Sika Sikasil WS-295 FPS White Base 1.5 Gallon Pail
Sikasil WS-295 FPS is a field-pigmentable Class 50 weathersealing silicone in a White Base 1.5 gallon pail for glazing and curtain-wall joints. It holds +/-50% movement and reaches tack-free in approximately 50 minutes at 77 F.
- Field-pigmentable Class 50 neutral-cure weatherseal
- Joint movement +/-50%
- Is tack-free in approximately 50 minutes at 77 F
$279.83
Sikasil WS-295 FPS
Sikasil WS-295 FPS is a field-pigmentable, one-component plus color pack, non-sag, neutral-cure silicone weatherseal that meets ASTM C920 Type S, Grade NS, Class 50 for glazing, curtain walls, and perimeter sealing. This White Base 1.5 gallon pail (part 412150) holds +/-50% movement, reaches Shore A 25 with approximately 200 psi tensile and 700% elongation, and is tack-free in approximately 50 minutes at 77 F. Mix in the field with Sikaflex / Sikasil Universal Color-Pak (sold separately).
Key Features
- One-component plus Universal Color-Pak, non-sag medium-modulus silicone
- Meets ASTM C920 Type S, Grade NS, Class 50, Use NT, M, G, A
- Joint movement +/-50%
- Shore A 25 with approximately 200 psi tensile and 700% elongation
- Tack-free approximately 50 minutes at 77 F; tooling window 20 to 30 minutes
- Holds SWRI ASTM C719 validation (No. 123-SIK295) and non-staining results for most porous substrates
Applications
- Weatherseal work in conventional glazing, including cap, toe, and heel beads
- Glass-to-glass butt joint glazing weatherseals
- Expansion and control joints in precast panels and metal curtain walls
- Perimeter sealing of doors, windows, and building components
Technical Specifications
| Property | Value |
|---|---|
| Manufacturer | Sika |
| Product | Sikasil WS-295 FPS |
| Part no. | 412150 |
| Unit | 1.5 gallon pail (Color-Pak sold separately) |
| Color | White Base |
| Chemistry | Field-pigmentable neutral-cure silicone |
| Movement | +/-50% (ASTM C-719) |
| Shore A | 25 |
| Tensile / elongation | Approximately 200 psi / 700% |
| Tack-free | Approximately 50 minutes at 77 F |
| VOC | 37 g/L |
Product documents: Sikasil WS-295 FPS Product Data Sheet (PDF)
Frequently Asked Questions
What movement capability does Sikasil WS-295 FPS hold?
+/-50% under ASTM C-719 at 77 F and 50% R.H., matching ASTM C920 Class 50.
What tack-free time should crews plan for with Sikasil WS-295 FPS?
Tack-free time is approximately 50 minutes at 77 F and 50% R.H. Tooling window is 20 to 30 minutes.
What joints suit Sikasil WS-295 FPS on the facade?
Conventional glazing beads, glass-to-glass butt weatherseals, precast and metal curtain-wall joints, and perimeter seals at doors and windows.
What hardness and elongation does cured Sikasil WS-295 FPS reach?
Shore A 25 with approximately 200 psi tensile strength and 700% elongation at break.
What color pack setup does Sikasil WS-295 FPS White Base use?
Field pigmentable base mixes with Sikaflex / Sikasil Universal Color-Pak sold separately. This page is the White Base only.
What size is the Sikasil WS-295 FPS pail on this page?
This page is the White Base 1.5 gallon pail, part 412150.
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